Jet pump



Sept. 21, 1943.

JET PUMP Filed April 20, 1943 Inventor B27205 Jaez Mafi/zews m a 5 f L wk 7 /6/ 2 v w 9 H4 y y W mil: 2 3 7 m M/ w 1 W .9 x L i w .5 7 S W V 9E? L j m 2 4\ 11 A 1, v fi ll ill I/ Y I L 4 2 5 2 T w 6 G W PatentedSept. 21, 1943 zszaezi UNETED STATES PATENT OFFICE JET PUMP mas JoelMatthews, Nashville, Tenn. Application April 20, 1943, Serial No.483,778

2 Claims.

This invention relates to new and useful improvements in deep well pumpsand more particularly to a pump of the jet type.

The principal object of the present invention is to provide a jet typedeep well pump constructed in such a manner as to prevent accumulationof foreign matter in the nozzle, which is the principal fault with thepresent-day jet pumps.

Another important object of the invention is to provide a sump for jettype pumps into which foreign matter can precipitate and remain overlong periods of time without interfering with the let nozzle.

Other objects and advantages'of the invention will become apparent tothe reader of the following description.

In the drawing:

Figure 1 is a fragmentary vertical sectional view through the jetportion of the pump.

Figure 2 is a fragmentary sectional view taken on the line 2-2 of Figure1.

Figure 3 is a cross section on the line 33 of Figure 1.

Figure 4 is a section on the line 4-4 of Figure 1.

Figure 5 is a section on the line 55 of Figure 1.

Figure 6 is a ure 1.

Figure 7 is a section on the line 1-1 of Figure 1.

Figure 8 is a section on the line 8-8 of Figure 1.

Figure 9 is a section on the line 9-9 of Fi ure 1.

Referring to the drawing wherein like numerals designate like parts, itcan be seen that numeral 5 denotes a pressure pipe which extendsdownwardly from the usual pumping apparatus (not shown) to a fitting 6.Numeral 1 denotes an eduction pipe which extends upwardly in substantialparallel relation to the pipe 5 from the upper portion of the fitting 6.In line with the pipe 1 and depending from the fitting 6 is a foot valve8 and a strainer 9. Adjacent the valve8 and depending from the fitting 6in line with the pipe 5 is a sump in the form of a pipe section l havinga cap II at its lower end, this sump forming part of the presentinvention.

Numeral l2 denotes the usual flared tube projecting into the eductionpipe I and which has a throat l3 into which liquid is projected from anozzle I4. This nozzle 14 is threadedly disposed into the upper portionof a substantially narrow wing formation which projects from section onthe line 6-6 of Figthe sump l0 depends and the side from which the valve8 depends. This wing formation I5 has a very narrow entrance slot I6.This slot is elongated to take care of volume but very narrow to.eXclude foreign matter. This slot is the entrance to a canal 11. whichgradually constricts but Widens in dimension as is clearly depicted inFigures 4 to 9, inclusive, until the jet nozzle I4 is reached.

It can now be seen, that the main points of the present invention arethe sump ID for catching foreign matter that is unable to enter thecanal I '1 due to the nearness of the slot i6 and that the said slot. H5is no wider than the orifice ,in' the jet nozzle I 4' so that if anyvery small parparting from the spirit and scope of the inventhepartition wall 16 between the side from which tion asclaimedhereinafter.

Having described the claimed as new is:

1. A jet unit for jet pump systems comprising a fitting having apressure line extending tothe upper portion'thereof, a sump underlyingthe fitting at the pressure pipe, an eduction pipe rising from thefitting, a foot valve on the fitting underlying the eduction pipe,-a jetnozzle underlying the eduction pipe, said valve and eduction pipe'beingin communication, and a canal extending from the jet nozzle to thepressure side of the fitting and having its entrance overlying the sump,the pressure entrance of said canal being in the form of an elongatedslit, said canal pressure entrancereducing in transverse dimensiontoward the jet.

Z. A jet unit for jet pump systems comprising a fitting having apressure line extending to the upper portion thereof, a sump underlyingthe fitting at the pressure pipe, an eduction pipe rising from thefitting, a foot valve on the fitting underlying the eduction pipe, a jetnozzle underlying the eduction pipe, said valve and eduction pipe beingin communication, and a canal ex. tending from the jet nozzle to thepressure side of the fitting and having its entrance overlying the sump,the pressure entrance of said canal being .in the form of an elongatedslit, said canal pressure entrance reducing in transversedimeninvention, what is sion toward'the jet, said entrance slit beingsubstantially narrower than the orifice of'the J'et nozzle, 1

RUFUS JOEL MATTHEWS.

